Docking mechanisms and methods of restraining two portions of a computing device

ABSTRACT

A docking mechanism is described. The docking mechanism may include a locking protrusion and a locking receptacle configured to receive the locking protrusion and having an inclined surface. The docking mechanism may include a wedging member abutting the inclined surface. The docking mechanism may include a locking detent. The locking detent may have a spring configured to bias the locking detent towards the locking protrusion. Computing devices that include docking mechanisms are also described. Methods of use of the docking mechanisms are also described.

BACKGROUND Background and Relevant Art

Use of computing devices is becoming more ubiquitous by the day.Computing devices range from standard desktop computers to wearablecomputing technology and beyond. One area of computing devices that hasgrown in recent years is the hybrid computer. Hybrid computers may actas a tablet computer or a laptop computer. Many hybrid computers includeinput devices that may be separated from the screen.

The subject matter claimed herein is not limited to implementations thatsolve any disadvantages or that operate only in environments such asthose described above. Rather, this background is only provided toillustrate one example technology area where some implementationsdescribed herein may be practiced.

BRIEF SUMMARY

In one implementation, a docking mechanism is described. The dockingmechanism may include a locking protrusion and a locking receptacleconfigured to receive the locking protrusion and having an inclinedsurface. The docking mechanism may include a wedging member abutting theinclined surface. The docking mechanism may include a locking detent.The locking detent may have a spring configured to bias the lockingdetent towards the locking protrusion.

In another implementation, a computing device is described. Thecomputing device includes a locking protrusion and a locking receptacleconfigured to receive the locking protrusion and having an inclinedsurface. The computing device includes a wedging member having a springconfigured to bias the wedging member toward the locking protrusion. Atleast a portion of a front surface of the wedging member being curvedand at least a portion of a back surface of the wedging member beingcurved. The curved portion of the back surface abutting the inclinedsurface in a restraining state. The curved portion of the front surfaceabutting the locking protrusion in a biased state. The computing deviceincludes a locking detent having a spring configured to bias the detenttowards the locking protrusion. One or more of the wedging member andthe locking protrusion or the locking detent and the locking protrusionbeing in line to surface, point to surface, line to line, point to line,or point to point contact.

In a further implementation, a method for restraining two portions of acomputing device is described. The method includes inserting a lockingprotrusion of a first portion into a locking receptacle of a secondportion. A separation force is applied between the first portion and thesecond portion. If the separation force is less than 40 Newtons,separation of the first portion from the second portion is resisted. Ifthe separation force is greater than 50 Newtons, the first portion isseparated from the second portion.

This Summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

Additional features and advantages will be set forth in the descriptionwhich follows, and in part will be obvious from the description, or maybe learned by the practice of the teachings herein. Features andadvantages of the disclosure may be realized and obtained by means ofthe instruments and combinations particularly pointed out in theappended claims. Features of the present disclosure will become morefully apparent from the following description and appended claims, ormay be learned by the practice of the disclosure as set forthhereinafter.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the above-recited and otherfeatures of the disclosure can be obtained, a more particulardescription will be rendered by reference to specific implementationsthereof which are illustrated in the appended drawings. For betterunderstanding, the like elements have been designated by like referencenumbers throughout the various accompanying figures. While some of thedrawings may be schematic or exaggerated representations of concepts, atleast some of the drawings may be drawn to scale. Understanding that thedrawings depict some example implementations, the implementations willbe described and explained with additional specificity and detailthrough the use of the accompanying drawings in which:

FIG. 1 is an isometric view of an implementation of a computing device;

FIG. 2 is an isometric perspective separated view of the implementationof the computing device in FIG. 1;

FIG. 3 is a cutaway side view of an implementation of a dockingmechanism in an undocked configuration with a locking protrusionpartially inserted into a locking receptacle;

FIG. 4 is a cutaway side view of the implementation of the dockingmechanism in FIG. 3 with the locking protrusion engaged with componentsof the locking receptacle;

FIG. 5 is a cutaway side view of the implementation of a dockingmechanism in FIG. 3 with the locking protrusion fully inserted into thelocking receptacle and a biasing member of a wedging member in a biasedstate;

FIG. 6 is a cutaway side view of the implementation of a dockingmechanism in FIG. 3 with the locking protrusion fully inserted into thelocking receptacle and the wedging member in a restraining state;

FIG. 7 is a cutaway side view of another implementation of a dockingmechanism with a locking protrusion engaged with components of a lockingreceptacle;

FIG. 8 is a cutaway side view of the implementation of the dockingmechanism in FIG. 7 with the locking protrusion fully inserted into thelocking receptacle and a biasing member of a wedging member in a biasedstate;

FIG. 9 is a cutaway side view of the implementation of the dockingmechanism in FIG. 7 with the locking protrusion fully inserted into thelocking receptacle and the wedging member in a restraining state;

FIG. 10 is a cutaway side view of a further implementation of a dockingmechanism with a locking protrusion partially inserted into a lockingreceptacle;

FIG. 11 is a cutaway side view of the implementation of a dockingmechanism in FIG. 10 with the locking protrusion engaged with componentsof the locking receptacle;

FIG. 12 is a cutaway side view of the implementation of a dockingmechanism in FIG. 10 with the locking protrusion fully inserted into thelocking receptacle and the wedging member in a restraining state;

FIG. 13 is a cutaway side view of yet another implementation of adocking mechanism in an undocked configuration;

FIG. 14 is a cutaway side view of the implementation of the dockingmechanism in FIG. 13 with the locking protrusion partially inserted intothe locking receptacle;

FIG. 15 is a cutaway side view of the implementation of a dockingmechanism in FIG. 13 with the locking protrusion fully inserted into thelocking receptacle and a biasing member of a wedging member in arestraining state; and

FIG. 16 is an exploded isometric view of the implementation of a dockingmechanism in FIG. 13.

DETAILED DESCRIPTION

This disclosure generally relates to docking mechanisms and methods ofrestraining two portions of a computing device. More particularly, thisdisclosure generally relates to docking mechanisms, systems, and methodsfor securing computing devices.

FIG. 1 is an isometric view of an implementation of a computing device100 and FIG. 2 is an isometric perspective separated view of theimplementation of the computing device 100 in FIG. 1. Referringgenerally to the computing device 100 shown in FIGS. 1 and 2, thecomputing device 100 may include a first portion 102 and a secondportion 104. The first portion 102 may be separably connected to thesecond portion 104 by a docking mechanism 120. For example, the firstportion 102 may be mechanically connected to the second portion 104 in adocked (and/or locked) configuration, such as the docked configurationshown in FIG. 1. The first portion 102 may transition from the dockedconfiguration to an undocked configuration, such as the undockedconfiguration shown in FIG. 2. The first portion 102 and the secondportion 104 may transition from the connected to the undockedconfiguration and from the unconnected to the docked configuration.

The docking mechanism 120 may include a locking protrusion 130 and alocking receptacle 140 (shown in FIG. 2). The locking receptacle 140 mayinclude an aperture 141 through which the locking protrusion 130 may beinserted.

By way of orientation, a first coordinate system 1-1 (including thex1-direction, the y1-direction, and the z1-direction) is provided forthe first portion 102 and a second coordinate system 1-2 (including thex2-direction, the y2-direction, and the z2-direction) is provided forthe second portion 104. In the illustrated configuration, thesecoordinate systems 1-1, 1-2 are rotated about their respective x-axes.When the angle (θ_(x)) between the first portion 102 and the secondportion 104 is 180 degrees, the x1 and x2 axes are parallel, the y1 andthe y2 axes, and the z1 and the z2 axes are parallel. When the angle(θ_(x)) between the first portion 102 and the second portion 104 isninety degrees, the x1 and x2 axes are parallel, the y1 and the z2 axesare parallel, and the z1 and the y2 axes are parallel (but opposite(e.g., with positive values extending in opposite directions)). For easeof description, front is the positive z-direction, back is the negativez-direction, top is the positive y-direction, bottom is the negativey-direction, right is the positive x-direction, and left is the negativex-direction. Although not shown in the remaining figures, similarorientation will be used for ease of description.

The first portion 102 may include a display 110. The display 110 may bea touch-sensitive display screen. The second portion 104 may include aninput device 111. The input device 111 may include a keyboard, atouchpad, one or more buttons, other input devices, or combinationsthereof that may be used to provide input to the processor 112. Althougha hybrid computing device is shown, the present disclosure may be usedwith other computing devices where two portions are separably connectedtogether. For example, the first portion 102 may be a mobile phone andthe second portion 104 may be a cover, a keyboard, or other device. Inother implementations, the docking mechanisms described herein may beused in a non-computing (e.g., purely mechanical) environment.

Although FIG. 1 and FIG. 2 illustrate the display 110 of the firstportion 102 and the input device 111 of the second portion 104 as facingeach other (e.g., both being on the front side of their respectiveportions), in at least one implementation described herein, the firstportion 102 and second portion 104 may be reversible. For example, thefirst portion 102 may connect to the second portion 104 as shown (e.g.,with the display 110 facing the front) and may be undocked, rotated 180degrees, and docked to the second portion 104 such that the firstportion 102 faces the opposite direction (e.g., with the display 110facing the back). Thus, the docking mechanism 120 may be configured toallow a reversible connection between the first portion 102 and thesecond portion 104.

The first portion 102 and/or the second portion 104 may include aprocessor 112, memory 113, a battery 114, other computing components, orcombinations thereof. For example, as shown, the first portion 102 mayinclude a processor 112, memory 113, and a battery 114 while the secondportion 104 may also include a processor 112. In some implementations,only one of the first portion 102 or the second portion 104 may includea processor 112. In other implementations, both of the first portion 102and the second portion 104 include a processor 112. In furtherimplementations, one or more computing components (e.g., processors 112,memory 113, and battery 114) may be included in the first portion 102and/or the second portion 104 in any combination.

The computing components in the second portion 104 may be in electroniccommunication with one or more of the computing components in the firstportion 102. For example, as shown in FIG. 2, the first portion 102 andthe second portion 104 may be in electronic communication via a physicalelectrical connector that includes an electrical protrusion 108 and anelectrical receptacle 109.

As shown in FIG. 2, one or more electrical protrusions 108 are locatedon the second portion 104 and one or more electrical receptacles 109 arelocated on the first portion 102. In other implementations, one or moreelectrical receptacles 109 are located on the second portion 104 and oneor more electrical protrusions 108 are located on the first portion 102.In further implementations, the first portion 102 and the second portion104 may include one or more electrical receptacles 109 and one or moreelectrical protrusions 108, such that each of the first portion 102 andsecond portion 104 may include a combination of electrical receptacles109 and electrical protrusions 108.

The electrical protrusions 108 and/or electrical receptacles 109 mayinclude various electrical connections. As shown, the electricalprotrusions 108 and electrical receptacles 109 include multiple pinconnectors. In implementations where computing components (e.g., theprocessor 112, memory 113, or battery 114) are on separate portions(e.g., first portion 102 and second portion 104), maintaining electricalcommunication between the first portion 102 and the second portion 104may be important. For example, if a computing component on the secondportion 104 were to lose electrical communication with an electricalcomponent on the first portion 102, the computing device 100 may fail(e.g., an operating system may crash or a computing component may beaffected by a power surge when the electrical connection is restored).Some electrical connections may be sensitive (e.g., high speed). Thus,in some implementations, it may desirable for the first portion 102 andthe second portion 104 to be securely connected together in the dockedconfiguration by a docking mechanism 120. Furthermore, in someimplementations, it may be desirable for a computing component (e.g.,the processor 112, memory 113, or battery 114) in the second portion 104to hand off its responsibilities to a computing component (e.g., theprocessor 112, memory 113, or battery 114) on the first portion 102 (orvice versa) before undocking from the first portion 102.

The computing device 100 may include one or more docking mechanisms 120.As illustrated in FIG. 2, the computing mechanism includes two dockingmechanisms 120. In other implementations, more or fewer dockingmechanisms 120 may be used. For example, a single docking mechanism 120may be used. The single docking mechanism 120 may incorporate both asingle locking protrusion 130 and one or more components of one or moreelectrical protrusions 108 into the single docking mechanism 120 to beinserted into a single locking receptacle 140 that includes one or morecomponents of one or more electrical receptacles 109.

The one or more docking mechanisms 120, as illustrated, may include oneor more locking receptacles 140 on the first portion 102 and one or morelocking protrusions 130 on the second portion 104. In otherimplementations, the first portion 102 and the second portion 104 mayeach include one or more locking protrusions 130 and corresponding oneor more locking receptacles 140. In other words, the first portion 102may include a first locking protrusion 130, a second locking receptacle140, and a third locking protrusion 130; and the second portion 104 mayinclude a first locking receptacle 140 corresponding to the firstlocking protrusion 130 on the first portion 102, a second lockingprotrusion 130 corresponding to the second locking receptacle 140 on thefirst portion, and a third locking receptacle 140 corresponding to thethird locking protrusion 130 on the first portion. More and or fewercombinations of docking mechanisms 120 in either configuration (e.g.,only locking protrusions 130 or locking receptacles 140 on each portionor combinations of locking protrusions 130 or locking receptacles 140 oneach portion) may be used.

As described above, in some implementations, the one or more dockingmechanisms 120 may include one or more magnets 122. As shown, in FIG. 2each docking mechanism 120 may include one or more magnets 122. In otherimplementations, one magnet 122 may be used for more than one dockingmechanism 120 and/or more than one magnet 122 may be used for eachdocking mechanism 120.

The locking protrusions 130, in the illustrated implementation, mayinclude a planar upper surface and a planar lower surface. The lockingprotrusions 130 may have edges that are rounded, chamfered, otherwiseshaped, or combinations thereof.

The first portion 102 and the second portion 104 may have thicknesses103 and 105, respectively. In some implementations, the thicknesses 103,105 may be in a range having an upper value, a lower value, or upper andlower values including any of 3.0 millimeters, 4.0 millimeters, 5.0millimeters, 6.0 millimeters, 7.0 millimeters, 8.0 millimeters, 10.0millimeters, or any value therebetween. For example, the thicknesses103, 105 may be greater than 3.0 millimeters. In other examples, thethicknesses 103, 105 may be less than 10.0 millimeters. In yet otherexamples, the thicknesses 103, 105 may be in a range of 3.0 millimetersto 10.0 millimeters.

The display 110 may be spaced from an edge of the first portion 102 by adistance 107. In some implementations, the distance 107 may be in arange having an upper value, a lower value, or upper and lower valuesincluding any of 0.0 millimeters, 0.1 millimeters, 0.5 millimeters, 1.0millimeters, 2.0 millimeters, 3.0 millimeters, 4.0 millimeters, 5.0millimeters, 6.0 millimeters, 7.0 millimeters, 8.0 millimeters, 10.0millimeters, 15.0 millimeters, 20.0 millimeters or any valuetherebetween. For example, the distance 107 may be greater than 0.1millimeters. In other examples, the distance 107 may be less than 20.0millimeters. In yet other examples, the distance 107 may be in a rangeof 0.0 millimeters to 12.0 millimeters. For example, in someimplementations, the distance 107 may be 0.0 millimeters. In theseimplementations, the docking mechanism 120 may have even less space thanthat shown, as the display 110 would extend to the edge of the device100.

As devices continue to decrease in size and/or displays continue toincrease in size, the amount of available space for components of adocking mechanism decreases. For example, the thickness 103 of the firstportion 102 and/or the distance 107 of the display 110 from an edge ofthe first portion 102 may reduce the available space for the lockingreceptacle 140. In other words, one or more of a height 142 (e.g., inthe z-direction), width 143 (e.g., in the x-direction), depth (e.g.,depth 244) (e.g., in the y-direction) of a locking receptacle 140 may beconstrained by one or more of the thickness 103 of the first portion 102and the distance 107 between the display 110 and an edge of the firstportion 102. In implementations where there is more space, actuators orother locking mechanisms may be used to lock and unlock the first andsecond portions. However, in implementations where space is constrained,there may not be sufficient space for actuators or other lockingmechanisms. In at least one implementation, the docking mechanism 120may be used without an actuator.

In some implementations, the height 142 of the locking receptacle 140may be in a range having an upper value, a lower value, or upper andlower values including any of 0.50 millimeters, 1.0 millimeters, 2.0millimeters, 3.0 millimeters, 5.0 millimeters, 10.0 millimeters, or anyvalue therebetween. For example, the height 142 may be greater than 0.5millimeters. In other examples, the height 142 may be less than 7.0millimeters. In yet other examples, the height 142 may be in a range of0.5 millimeters to 10.0 millimeters.

In some implementations, the width 143 of the locking receptacle 140 maybe in a range having an upper value, a lower value, or upper and lowervalues including any of 2.0 millimeters, 3.0 millimeters, 5.0millimeters, 10.0 millimeters, 15.0 millimeters, 20.0 millimeters or anyvalue therebetween. For example, the width 143 may be greater than 2.0millimeters. In other examples, the width 143 may be less than 20.0millimeters. In yet other examples, the width 143 may be in a range of2.0 millimeters to 20.0 millimeters. In further implementations, thedocking mechanism 120 may extend along a majority of the bottom of thefirst portion 102. For example, the width 143 of the locking receptacle140 in these implementations may be in a range having an upper value, alower value, or upper and lower values including any of 20.0millimeters, 30.0 millimeters, 55.0 millimeters, 100.0 millimeters,150.0 millimeters, 200.0 millimeters, 250.0 millimeters, 300.0millimeters, or any value therebetween. For example, the width 143 maybe greater than 20.0 millimeters. In other examples, the width 143 maybe less than 300.0 millimeters. In yet other examples, the width 143 maybe in a range of 20.0 millimeters to 300.0 millimeters.

In some implementations, the depth (e.g., depth 244) of the lockingreceptacle 140 may be in a range having an upper value, a lower value,or upper and lower values including any of 1.0 millimeters, 2.0millimeters, 3.0 millimeters, 5.0 millimeters, 7.0 millimeters, 10.0millimeters, or any value therebetween. For example, the depth (e.g.,depth 244) may be greater than 1.0 millimeters. In other examples, thedepth (e.g., depth 244) may be less than 10.0 millimeters. In yet otherexamples, the depth (e.g., depth 244) may be in a range of 1.0millimeters to 10.0 millimeters. In one example, the height 142 may beless than 5.0 mm, the width 143 may be less than 10.0 mm, and the depth(e.g., depth) 244 may be less than 4.5 mm. In another example, the width143 may be less than 5.0 mm.

An aspect ratio (e.g., between the height 142 and the depth (e.g., depth244)) of the aperture 141 may be greater than 1:3. In someimplementations, the aspect ratio may be in a range having an uppervalue, a lower value, or upper and lower values including any of 1:3,1:4, 1:5, 1:6, 1:7, 1:8, or any value therebetween. For example, theaspect ratio may be greater than 1.8. In other examples, the aspectratio may be less than 1:3. In yet other examples, the aspect ratio maybe in a range of 1.8 to 1:3.

The docking mechanism 120 may be replaced with any docking mechanism orone or more components of any docking mechanism described herein. Forexample, the docking mechanism 120 may be replaced with the dockingmechanism 320 described in connection with FIGS. 7-9, the lockingprotrusion 130 may be replaced with the locking protrusion 430 describedin connection with FIGS. 10-12, and one or more of the biasing members352, 362 may be replaced with one or more of the biasing members 552,562 described in connection with FIGS. 13-15.

FIG. 3 is a cutaway side view of an implementation of a dockingmechanism 220 in an undocked configuration with a locking protrusion 230partially inserted into a locking receptacle 240. FIG. 4 is a cutawayside view of the implementation of the docking mechanism 220 in FIG. 3with the locking protrusion 230 engaged with components of the lockingreceptacle 240. FIG. 5 is a cutaway side view of the implementation of adocking mechanism 220 in FIG. 3 with the locking protrusion 230 fullyinserted into the locking receptacle 240 and a biasing member 252 of awedging member 250 in a biased state. FIG. 6 is a cutaway side view ofthe implementation of a docking mechanism 220 in FIG. 3 with the lockingprotrusion 230 fully inserted into the locking receptacle 240 and thewedging member 250 in a restraining state.

Referring generally to FIGS. 3-6, the docking mechanism 220 may be usedinstead of or in addition to any docking mechanism described herein. Thedocking mechanism 220 may include a locking protrusion 230 and a lockingreceptacle 240. The locking protrusion 230 may be connected (e.g.,directly, integrally, or otherwise connected) to a first portion (e.g.,first portion 102) and the locking receptacle 240 may be connected to asecond portion (e.g., second portion 104). In other implementations, thelocking protrusion 230 may be connected to a second portion and thelocking receptacle 240 may be connected to a first portion. Although thelocking protrusion 230 is shown unattached to a first or second portion,the locking protrusion 230 is shown as the portion of the lockingprotrusion 230 that extends into the locking receptacle 240. In someimplementations, the portion of the locking protrusion 230 that extendsinto the locking receptacle 240 may be directly connected to the firstor second portion (e.g., first portion 102 and second portion 104). Inother implementations, the locking protrusion 230 may be longer than theportion that extends into the locking receptacle 240.

Components (e.g., one or more of a locking protrusion 230, lockingreceptacle 240, wedging member 250, locking detent 260, magnets 122, orcombinations thereof) of the docking mechanism 220 cooperate to limitmovement of the first portion and the second portion with respect toeach other. For example, the locking protrusion 230 and components ofthe locking receptacle 240 may cooperate to resist a separation force(e.g., in the direction of the length of the locking protrusion 230) ofless than 30 Newtons (e.g., excluding any component of the force ofgravity). Resisting a separation force may include, for example,separation movement (e.g., movement of the locking protrusion 230 out ofthe locking receptacle 240) of the locking protrusion 230 and thelocking receptacle of less than 1 millimeter for a sustained (e.g.,continuous for a period of time or above an amount for a period of time)separation force. In some implementations, the separation force that thecomponents of the docking mechanism 220 may cooperate to resist may bein a range having an upper value, a lower value, or upper and lowervalues including any of 10 Newtons, 15 Newtons, 20 Newtons, 25 Newtons,30 Newtons, 35 Newtons, 40 Newtons, 50 Newtons, 60 Newtons, 75 Newtons,100 Newtons, or any value therebetween. For example, the resistedseparation force may be greater than 10 Newtons. In other examples, theresisted separation force may be less than 100 Newtons. In yet otherexamples, the resisted separation force may be in a range of 10 Newtonsto 75 Newtons. Separation forces greater than 30 Newtons may bedifficult for some users to achieve. For example, elderly or infirmusers may not have sufficient strength to separate a first portion froma second portion.

In some implementations, one or more docking mechanisms 220 may be used.In implementations with a plurality of docking mechanisms 220, thedocking mechanisms may combine to resist separation forces in the valuesand/or ranges provided above. In some implementations, one or moremagnets (e.g., magnets 122 in FIG. 2) and one or more docking mechanisms220 may be used. In implementations with a plurality of dockingmechanisms 220 and/or a plurality of magnets, the docking mechanismsand/or magnets may combine to resist separation forces in the valuesand/or ranges provided above.

Components of the docking mechanism 220 may include the lockingprotrusion 230, locking receptacle 240, wedging member 250, lockingdetent 260, other components, or combinations thereof. The lockingprotrusion 230 may include a back surface 237 and a front surface 239.The locking protrusion 230 may include a top surface (not labeled) and abottom surface (not labeled).

The locking protrusion 230 may have a length extending between the topand bottom surface. In some implementations, the length may be in arange having an upper value, a lower value, or upper and lower valuesincluding any of 1.0 millimeters, 1.5 millimeters, 2.0 millimeters, 2.5millimeters, 3.0 millimeters, 3.5 millimeters, 4.0 millimeters, 4.5millimeters, 5.0 millimeters, 6.0 millimeters, 7.5 millimeters, 10.0millimeters, or any value therebetween. For example, the length may begreater than 1.0 millimeters. In other examples, the length may be lessthan 10.0 millimeters. In yet other examples, the length may be in arange of 1.0 millimeters to 10.0 millimeters. Shorter lengths (e.g.,less than 10.0 millimeters) make it more difficult to retain the firstportion and the second portion.

The locking protrusion 230 may have a width extending between the backsurface 237 and the front surface 239. The width, in someimplementations, may be in a range having an upper value, a lower value,or upper and lower values including any of 3.0 millimeters, 4.0millimeters, 5.0 millimeters, 6.0 millimeters, 7.0 millimeters, 8.0millimeters, 10.0 millimeters, or any value therebetween. For example,the width may be greater than 3.0 millimeters. In other examples, thewidth may be less than 10.0 millimeters. In yet other examples, thewidth may be in a range of 3.0 millimeters to 10.0 millimeters.

The locking receptacle 240 may have an aperture 241 through which thelocking protrusion 230 may be inserted, as shown in FIG. 3. The aperture241 may include a height 242 (e.g., in the z-direction). The height 242may be within the ranges provided above. A thickness (e.g., in thez-direction) (not labeled) of the locking protrusion 230 is less thanthe height 242 of the aperture 241 in order for the locking protrusion230 to be inserted into the aperture 241.

The locking receptacle 240 may have an internal depth 244. The internaldepth 244 may be within the ranges provided above. As shown in FIG. 6,the locking protrusion 230 may be shorter than the internal depth 244 ofthe locking receptacle 240. In other implementations, the lockingprotrusion 230 may be of sufficient length to abut the top surface (notlabeled) of the locking receptacle 240. The locking receptacle 240 mayinclude an inclined surface 246 and a bottom surface 248.

The docking mechanism 220 may include a wedging member 250. The wedgingmember 250 may include a back surface 256, a front surface 257, a bottomsurface 258, and a top surface (not labeled). The wedging member 250 mayinteract with the inclined surface 246 and/or the locking detent 260 toretain the locking protrusion 230 within the locking receptacle 240. Asshown in FIG. 3, the wedging member 250 may start in the undockedconfiguration. The front surface 257 of the wedging member 250 mayinteract with the back surface 237 of the locking protrusion 230. Forexample, as the locking protrusion 230 is inserted into the lockingreceptacle 240, as shown in FIG. 4, the locking protrusion 230 may abutthe front surface 257 (e.g., by the back surface 237 of the lockingprotrusion 230). As shown in FIGS. 3 and 6, the wedging member 250 mayabut the inclined surface 246 in both the undocked and restrainingstates.

The abutting relationship between the wedging member 250 and theinclined surface 246 may be facilitated by a biasing member 252. Forexample, the top surface of the wedging member 250 may interact with thebiasing member 252. The biasing member 252 may bias the wedging member250 toward the bottom surface 248 of the locking receptacle 240. Thelocking detent 260 may include a biasing member 262. The biasing member262 may bias the locking detent toward the front surface 239 of thelocking protrusion 230.

The biasing members 252, 262 may include a spring, a coiled spring, aflat spring, formed sheet metal, opposing magnets, an elasticallydeformable material, other biasing members, or combinations thereof. Theone or more of the biasing members 252, 262 may apply a continuousbiasing force. The biasing members 252, 262 may have spring rates thatincreases as the biasing member is compressed (and/or elongated if thebiasing member is in tension). In some implementations, the spring ratemay be constant. In other implementations, the spring rate may not beconstant.

As shown in FIG. 3, the inclined surface 246 may be disposed at an angleθ₂₄₆. The angle θ₂₄₆ of the inclined surface 246 correlates with thefrictional force applied by the inclined surface 246 to the lockingprotrusion 230. For example, the force of friction (e.g., toward theaperture 241) of the wedging member 250 on the locking protrusion 230may correspond to the angle θ₂₄₆ of the inclined surface 246 and thecoefficient of friction of the inclined surface 246 and the lockingprotrusion 230. In at least one implementation, the angle θ₂₄₆ may be22.62 degrees. In some implementations, the angle θ₂₄₆ may be in a rangehaving an upper value, a lower value, or upper and lower valuesincluding any of 5.0 degrees, 10.0 degrees, 15.0 degrees, 20.0 degrees,25.0 degrees, 30.0 degrees, 35.0 degrees, 40.0 degrees, 45.0 degrees,50.0 degrees, 55.0 degrees, 60.0 degrees, or any value therebetween. Forexample, the angle θ₂₄₆ may be greater than 5.0 degrees. In otherexamples, the angle θ₂₄₆ may be less than 60.0 degrees. In yet otherexamples, the angle θ₂₄₆ may be in a range of 5.0 degrees to 60.0degrees. The larger the angle θ₂₄₆, the smaller the coefficient offriction required to resist removal of the locking protrusion 230. Thesmaller the angle θ₂₄₆, the larger the coefficient of friction requiredto resist removal of the locking protrusion 230.

FIG. 4 illustrates that the frictional force between the lockingprotrusion 230 and the wedging member 250 may move the wedging membertoward the top surface of the locking receptacle 240 as the lockingprotrusion 230 is inserted into the locking receptacle 240. FIG. 5illustrates the locking protrusion 230 completely inserted into thelocking receptacle 240. At this moment, the wedging member 250 maytransition toward and/or to the restraining state shown in FIG. 6.

In some implementations, the coefficient of friction of the wedgingmember 250 and the inclined surface 246 may be the same, may differ byless than 0.5, may differ by less than 1.0, may differ by less than 1.5,or may differ by less than 2.0. In some implementations, the coefficientof friction of the wedging member 250 and/or the inclined surface 246may be in a range having an upper value, a lower value, or upper andlower values including any of 0.1, 0.15, 0.20, 0.22, 0.24, 0.26, 0.28,0.30, 0.32, 0.34, 0.36, 0.38, 0.40, or any value therebetween. Forexample, the coefficient of friction may be greater than 0.20. In otherexamples, the coefficient of friction may be less than 0.40. In yetother examples, the coefficient of friction may be in a range of 0.10 to0.40.

In at least one implementation, only the wedging member 250 or only thelocking detent 260 may be used. For example, in implementations withonly a wedging member 250, the wedging member 250 may restrain thelocking protrusion 230 between the wedging member 250 and an innersurface of the locking receptacle 240. In another example, inimplementations with only a locking detent 260, the locking detent 260may restrain the locking protrusion 230 between the locking detent 260and an inner surface of the locking receptacle 240.

The locking detent 260 may include a back surface 269. The back surface269 may interact with the front surface 239 of the locking protrusion230. For example, as shown, the back surface 269 has a curved shape incross-section. The curved shape of the back surface 269 creates acontact point at the apex of the curve. Thus, a curved back surface 269may create line (e.g., for a cylindrical shape) or point (e.g., for aspherical shape) contact with the front surface 239 of the lockingprotrusion 230, where the front surface 239, for example, is flat or hasa radius of curvature greater than a radius of curvature of the backsurface 269 of the locking detent 260. In other words, contact betweenthe locking detent 260 and the locking protrusion 230 may be in the formof a point (e.g., for a three-dimensional curved back surface 269) tosurface (e.g., for a flat front surface 239), to line (e.g., for atwo-dimensional curved front surface 239), to point (e.g., for athree-dimensional curved front surface 239) contact; a line (e.g., for atwo-dimensional curved back surface 269) to surface (e.g., for a flatfront surface 239), to line (e.g., for a two-dimensional curved frontsurface 239), to point (e.g., for a three-dimensional curved frontsurface 239) contact; or a surface (e.g., for a flat back surface 269)to surface (e.g., for a flat front surface 239), to line (e.g., for atwo-dimensional curved front surface 239), to point (e.g., for athree-dimensional curved front surface 239) contact. When the lockingdetent 260 applies a force to the locking protrusion 230,surface-to-surface contact spreads the force over the overlappingsurfaces, line-to-line contact spreads the force over the overlappinglines, and point-to-point contact spreads the force over the overlappingpoints. The type of contact (e.g., point to point, to line, or tosurface; line to point, to line, or to surface; or surface to point, toline, or to surface) may affect the frictional coefficient selected foran interface (e.g., between the wedging member 250 and the lockingreceptacle 240, the wedging member 250 and the locking protrusion 230,and the locking detent 260 and the locking protrusion 230).

Retention of the locking protrusion 230 in the locking receptacle 240may be based on the force applied by the wedging member 250 and/or thelocking detent 260 to the locking protrusion 230. For example, thewedging member 250 and/or the locking detent 260 may apply force to thelocking protrusion 230.

The locking protrusion 230, the locking receptacle 240, the wedgingmember 250, the locking detent 260, other components of the dockingmechanism 220, or combinations thereof may be formed of variousmaterials. For example, the locking receptacle 240 may be formed ofmagnesium and the locking protrusion 230, wedging member 250, andlocking detent 260 may be formed of stainless steel. In someimplementations, one or more components of the docking mechanism 220 maybe formed of the same material and/or different materials.

In implementations where the back surface 269 of the locking detent 260is curved in three dimensions, the back surface 269 may deform the frontsurface 239 of the locking protrusion 230. For example, the lockingprotrusion 230 may have a lower yield strength than the yield strengthof the locking detent 260. In some implementations, the difference inyield strength between the locking detent 260 and the locking protrusion230 may be in a range having an upper value, a lower value, or upper andlower values including any of 50 megapascals (MPa), 100 MPa, 150 MPa,200 MPa, 250 MPa, 300 MPa, or any value therebetween. For example, thedifference in yield strength between the locking detent 260 and thelocking protrusion 230 may be greater than 50 MPa. In other examples,the difference in yield strength between the locking detent 260 and thelocking protrusion 230 may be less than 300 MPa. In yet other examples,the difference in yield strength between the locking detent 260 and thelocking protrusion 230 may be in a range of 50 MPa to 300 MPa.Differences in yield strength between the wedging member 250 and thelocking protrusion 230 may be in the same ranges as the locking detent260 and the locking protrusion 230.

Although the Figures illustrate the locking detent 260 on a front sideof the locking receptacle 240 (and the wedging member 250 on a backside), in other implementations, the locking detent 260 may be on a backside of the locking receptacle 240 (and the wedging member 250 on thefront side). In some implementations, the docking mechanism 220 mayinclude two wedging members 250 and/or two locking detents 260. Forinstance, a first wedging member 250 may be on a front side of thelocking receptacle 240 and a second wedging member 250 may be on a backside of the locking receptacle 240. Two wedging members 250 and/or twolocking detents may cooperate to retain the locking protrusion 230within the locking receptacle 240.

The bottom surface 258 of the wedging member 250 is shown abutting thebottom surface 248 of the locking receptacle 240. In otherimplementations, the bottom surfaces 248, 258 may not abut.

FIG. 7 is a cutaway side view of another implementation of a dockingmechanism 320 with a locking protrusion 330 engaged with components of alocking receptacle 340. FIG. 8 is a cutaway side view of theimplementation of the docking mechanism 320 in FIG. 7 with the lockingprotrusion 330 fully inserted into the locking receptacle 340 and abiasing member 352 of a wedging member 350 in a biased state. FIG. 9 isa cutaway side view of the implementation of the docking mechanism 320in FIG. 7 with the locking protrusion 330 fully inserted into thelocking receptacle 340 and the wedging member 350 in a restrainingstate. The other implementation of a docking mechanism 320 shown inFIGS. 7-9 may be similar to the docking mechanism 220 shown in FIGS.3-6. Like numerals designate like elements.

For ease of description, differences between the docking mechanism 320and docking mechanism 220 will be highlighted. The description of thedocking mechanism 220 is hereby incorporated by reference in itsentirety.

The docking mechanism 320 may include one or more of a lockingprotrusion 330, a locking receptacle 340, a wedging member 350, and alocking detent 360. The locking protrusion 330 may include a backsurface 337 and a front surface 339. The locking receptacle 340 mayinclude an inclined surface 346 and a bottom surface 348. The lockingdetent 360 may include a biasing member 362 and a back surface 369.

The wedging member 350 may differ from the wedging member 250 of FIGS.3-6. For example, the wedging member 250 is shown in FIGS. 3-6 with aflat (e.g., straight) back surface 356, front surface 357, and bottomsurface 358. As shown in FIGS. 7-9, the wedging member 350 may includeone or more of an at least partially curved back surface 356 and an atleast partially curved front surface 357. As described above withrespect to the back surface 269 of the locking detent 260, a curved backsurface 356 and/or front surface 357 of the wedging member may providepoint or line contact with the inclined surface 346 of the lockingreceptacle 340 and/or back surface 337 of the locking protrusion 330.

Contact between the wedging member 350 and the locking protrusion 330may be in the form of a point (e.g., for a three-dimensional curvedfront surface 357) to surface (e.g., for a flat front surface 339), toline (e.g., for a two-dimensional curved front surface 339), to point(e.g., for a three-dimensional curved front surface 339) contact; a line(e.g., for a two-dimensional curved front surface 357) to surface (e.g.,for a flat front surface 339), to line (e.g., for a two-dimensionalcurved front surface 339), to point (e.g., for a three-dimensionalcurved front surface 339) contact; or a surface (e.g., for a flat frontsurface 357) to surface (e.g., for a flat front surface 339), to line(e.g., for a two-dimensional curved front surface 339), to point (e.g.,for a three-dimensional curved front surface 339) contact.

Contact between the wedging member 350 and the locking receptacle 340may be in the form of a point (e.g., for a three-dimensional curved backsurface 356) to surface (e.g., for a flat inclined surface 346), to line(e.g., for a two-dimensional curved inclined surface 346), to point(e.g., for a three-dimensional curved inclined surface 346) contact; aline (e.g., for a two-dimensional curved back surface 356) to surface(e.g., for a flat inclined surface 346), to line (e.g., for atwo-dimensional curved inclined surface 346), to point (e.g., for athree-dimensional curved inclined surface 346) contact; or a surface(e.g., for a flat back surface 356) to surface (e.g., for a flatinclined surface 346), to line (e.g., for a two-dimensional curvedinclined surface 346), to point (e.g., for a three-dimensional curvedinclined surface 346) contact.

Contact between the locking detent 360 and the locking protrusion 330may be in the form of a point (e.g., for a three-dimensional curved backsurface 369) to surface (e.g., for a flat front surface 339), to line(e.g., for a two-dimensional curved front surface 339), to point (e.g.,for a three-dimensional curved front surface 339) contact; a line (e.g.,for a two-dimensional curved back surface 369) to surface (e.g., for aflat front surface 339), to line (e.g., for a two-dimensional curvedfront surface 339), to point (e.g., for a three-dimensional curved frontsurface 339) contact; or a surface (e.g., for a flat back surface 369)to surface (e.g., for a flat front surface 339), to line (e.g., for atwo-dimensional curved front surface 339), to point (e.g., for athree-dimensional curved front surface 339) contact.

The type of contact (e.g., point to point, to line, or to surface; lineto point, to line, or to surface; or surface to point, to line, or tosurface) may affect the frictional coefficient selected for an interface(e.g., between the wedging member 350 and the locking receptacle 340,the wedging member 350 and the locking protrusion 330, and the lockingdetent 360 and the locking protrusion 330).

In implementations where two or more interfacing surfaces is curved(e.g., in two or three dimensions), aligning the two or more interfacingsurfaces may be important. For example, as shown in FIG. 9, the frontsurface 357 of the wedging member 350 and the back surface 369 of thelocking detent 360 have curved surfaces. The front surface 357 of thewedging member 350 and the back surface 369 of the locking detent 360are shown in FIG. 9 as aligned (e.g., in the y-direction) in therestraining state. The closer to aligned the curved surfaces (e.g., backsurface 369 and front surface 357), the more direct the application offorce from those surfaces. In order to facilitate alignment of thelocking detent 360 and the wedging member 350, the locking receptacle340 may include a bottom surface 348 that may abut with the bottomsurface 358 of the wedging member 350.

FIG. 10 is a cutaway side view of a further implementation of a dockingmechanism 420 with a locking protrusion 430 partially inserted into alocking receptacle 440. FIG. 11 is a cutaway side view of theimplementation of a docking mechanism 420 in FIG. 10 with the lockingprotrusion 430 engaged with components of the locking receptacle 440.FIG. 12 is a cutaway side view of the implementation of a dockingmechanism 420 in FIG. 10 with the locking protrusion 430 fully insertedinto the locking receptacle 440 and the wedging member 450 in arestraining state. The further implementation of a docking mechanism 420shown in FIGS. 10-12 may be similar to the docking mechanisms 220, 320shown in FIGS. 3-6 and 7-9, respectively. Like numerals designate likeelements.

For ease of description, differences between the docking mechanism 420and docking mechanisms 220, 320 will be highlighted. The description ofthe docking mechanisms 220, 320 are hereby incorporated by reference intheir entireties.

The docking mechanism 420 may include one or more of a lockingprotrusion 430, locking receptacle 440, a wedging member 450, and alocking detent 460. The locking receptacle 440 may include an inclinedsurface 446 and a bottom surface 448.

The locking protrusion 430 may include a back surface 437 and a frontsurface 439. The back surface 437 and the front surface 439 are shown asbeing at least partially curved. The back surface 437 and the frontsurface 439 may be concave, as shown.

The wedging member 450 may include a biasing member 452, a back surface456, a front surface 457, and a bottom surface 458. The back surface 456and the front surface 457 may be convex, as shown. The locking detent460 may include a biasing member 462 and a convex back surface 469.

The concave back surface 437 of the locking protrusion 430 may interfacewith the convex front surface 457 of the wedging member 450. Because theback surface 437 is concave and the front surface 457 is convex, thesesurfaces are complementary and have surface-to-surface contact. Inimplementations where two interfacing surfaces are complementary (e.g.,one is concave and one is convex), the two surfaces may have even lowercoefficients of friction due to the inclined (e.g., curved) surfaces.

FIG. 13 is a cutaway side view of yet another implementation of adocking mechanism 520 in an undocked configuration. FIG. 14 is a cutawayside view of the implementation of the docking mechanism 520 in FIG. 13with the locking protrusion 530 partially inserted into the lockingreceptacle 540. FIG. 15 is a cutaway side view of the implementation ofa docking mechanism 520 in FIG. 13 with the locking protrusion 530 fullyinserted into the locking receptacle 540 and a biasing member 552 of awedging member 550 in a restraining state. FIG. 16 is an explodedisometric view of the implementation of a docking mechanism 520 in FIG.13.

The yet another implementation of a docking mechanism 520 shown in FIGS.10-12 may be similar to the docking mechanisms 220, 320, 420 shown inFIGS. 3-6, 7-9, and 10-12, respectively. Like numerals designate likeelements.

For ease of description, differences between the docking mechanism 520and docking mechanisms 220, 320, 420 will be highlighted. Thedescription of the docking mechanisms 220, 320, 420 are herebyincorporated by reference in their entireties.

The docking mechanism 520 may include one or more of a lockingprotrusion 530, locking receptacle 540, a wedging member 550, and alocking detent 560 and back surface 569. The locking protrusion 530 mayinclude a back surface 537 and a front surface 539. The lockingreceptacle 540 may include an inclined surface 546 and a bottom surface548. The locking receptacle 540 may have a width 543 and an internaldepth 544. The internal depth (e.g., depth 244) may be within the rangesprovided above. The wedging member 550 may include an at least partiallycurved back surface 556 and front surface 557 and a bottom surface 558.

The locking receptacle 540 is shown with a separate top surface (notlabeled). The top surface may be attached to the rest of the lockingreceptacle 540. The biasing members 552, 562 of the wedging member 550and the locking detent 560, respectively, may include a resilient strip

FIG. 16 illustrates the relative widths (e.g., width 573 of the lockingprotrusion 530, width 575 of the wedging member 550, and width 576 ofthe locking detent 560) of various components of the docking mechanism520. As shown, the width 573 of the locking protrusion 530 may besmaller than both the width 575 of the wedging member 550 and the width576 of the locking detent 560. Also as shown, the width 575 of thewedging member 550 may be the same as the width 576 of the lockingdetent 560. In other implementations, two or more of the width 573 ofthe locking protrusion 530, the width 575 of the wedging member 550, andthe width 576 of the locking detent 560 may be the same. In furtherimplementations, two or more of the width 573 of the locking protrusion530, the width 575 of the wedging member 550, and the width 576 of thelocking detent 560 may be different. In implementations where the width573 of the locking protrusion 530 is smaller than one or more of thewidth 575 of the wedging member 550 and the width 576 of the lockingdetent 560, it may be easier to insert the locking protrusion 530 intothe locking receptacle 540.

One or more methods for restraining two portions of a computing deviceare described. The methods may be used with one or more of the dockingmechanisms 120, 220, 320, 420, 520 described herein. In oneimplementation, the method may include inserting a locking protrusion ofa first portion into a locking receptacle of a second portion. Aseparation force may be applied between the first portion and the secondportion. If the separation force is less than 40 Newtons, separation ofthe first portion from the second portion may be resisted. If theseparation force is greater than 50 Newtons, the first portion may beseparated from the second portion.

The articles “a,” “an,” and “the” are intended to mean that there areone or more of the elements in the preceding descriptions. The terms“comprising,” “including,” and “having” are intended to be inclusive andmean that there may be additional elements other than the listedelements. Additionally, it should be understood that references to “oneimplementation” or “an implementation” of the present disclosure are notintended to be interpreted as excluding the existence of additionalimplementations that also incorporate the recited features. For example,any element described in relation to an implementation herein may becombinable with any element of any other implementation describedherein. Numbers, percentages, ratios, or other values stated herein areintended to include that value, and also other values that are “about”or “approximately” the stated value, as would be appreciated by one ofordinary skill in the art encompassed by implementations of the presentdisclosure. A stated value should therefore be interpreted broadlyenough to encompass values that are at least close enough to the statedvalue to perform a desired function or achieve a desired result. Thestated values include at least the variation to be expected in asuitable manufacturing or production process, and may include valuesthat are within 5%, within 1%, within 0.1%, or within 0.01% of a statedvalue.

A person having ordinary skill in the art should realize in view of thepresent disclosure that equivalent constructions do not depart from thespirit and scope of the present disclosure, and that various changes,substitutions, and alterations may be made to implementations disclosedherein without departing from the spirit and scope of the presentdisclosure. Equivalent constructions, including functional“means-plus-function” clauses are intended to cover the structuresdescribed herein as performing the recited function, including bothstructural equivalents that operate in the same manner, and equivalentstructures that provide the same function. It is the express intentionof the applicant not to invoke means-plus-function or other functionalclaiming for any claim except for those in which the words ‘means for’appear together with an associated function. Each addition, deletion,and modification to the implementations that falls within the meaningand scope of the claims is to be embraced by the claims.

It should be understood that any directions or reference frames in thepreceding description are merely relative directions or movements. Forexample, any references to “front” and “back” or “top” and “bottom” or“left” and “right” are merely descriptive of the relative position ormovement of the related elements.

The present disclosure may be embodied in other specific forms withoutdeparting from its spirit or characteristics. The describedimplementations are to be considered as illustrative and notrestrictive. The scope of the disclosure is, therefore, indicated by theappended claims rather than by the foregoing description. Changes thatcome within the meaning and range of equivalency of the claims are to beembraced within their scope.

1. A docking mechanism, comprising: a locking protrusion; a lockingreceptacle configured to receive the locking protrusion and having aninclined surface; a wedging member abutting the inclined surface; and alocking detent located within the locking receptacle, the locking detenthaving a spring configured to bias the locking detent towards thelocking protrusion.
 2. The docking mechanism of claim 1, wherein one ormore of the wedging member and the locking detent are in surface contactwith the locking protrusion.
 3. The docking mechanism of claim 1,wherein one or more of the wedging member and the locking detent are inline contact with the locking protrusion.
 4. The docking mechanism ofclaim 1, wherein one or more of the wedging member and the lockingdetent are in point contact with the locking protrusion.
 5. The dockingmechanism of claim 1, wherein one or more of the wedging member and thelocking detent are in at least partial surface contact with the lockingprotrusion.
 6. The docking mechanism of claim 1, wherein the wedgingmember and the locking detent are both in line contact with the lockingprotrusion.
 7. The docking mechanism of claim 1, wherein the wedgingmember and the locking detent are both in point contact with the lockingprotrusion.
 8. The docking mechanism of claim 1, wherein the wedgingmember is in line contact with the inclined surface.
 9. The dockingmechanism of claim 1, wherein the wedging member is in point contactwith the inclined surface.
 10. The docking mechanism of claim 1, whereinthe wedging member includes a curved surface.
 11. The docking mechanismof claim 1, wherein the wedging member includes a curved back surface.12. The docking mechanism of claim 1, wherein the wedging memberincludes a curved front surface.
 13. The docking mechanism of claim 1,wherein a first coefficient of friction between the wedging member andthe inclined surface is the same as a second coefficient of frictionbetween the wedging member and the locking protrusion.
 14. The dockingmechanism of claim 1, wherein a first coefficient of friction betweenthe wedging member and the inclined surface is between 0.2 and 0.4. 15.The docking mechanism of claim 1, wherein the locking detent, thewedging member, and the locking protrusion cooperate to retain thelocking protrusion within the locking receptacle until a separationforce of greater than 28 Newtons is applied.
 16. The docking mechanismof claim 15, wherein the separation force is less than 50 Newtons isapplied.
 17. The docking mechanism of claim 1, further comprising one ormore magnets, wherein the one or more magnets, the locking detent, thewedging member, and the locking protrusion cooperate to retain thelocking protrusion within the locking receptacle until a separationforce of greater than 28 Newtons is applied.
 18. The docking mechanismof claim 1, wherein a height of the locking protrusion is less than 5mm.
 19. A computing device, comprising: a locking protrusion; a lockingreceptacle configured to receive the locking protrusion and having aninclined surface; a wedging member having a spring configured to biasthe wedging member toward the locking protrusion, at least a portion ofa front surface of the wedging member being curved and at least aportion of a back surface of the wedging member being curved, the curvedportion of the back surface abutting the inclined surface in arestraining state, the curved portion of the front surface abutting thelocking protrusion in a biased state; and a locking detent having aspring configured to bias the detent towards the locking protrusion, oneor more of the wedging member and the locking protrusion or the lockingdetent and the locking protrusion being in line to surface, point tosurface, line to line, point to line, or point to point contact.
 20. Amethod for restraining two portions of a computing device, comprising:inserting a locking protrusion of a first portion into a lockingreceptacle of a second portion; applying a separation force between thefirst portion and the second portion; if the separation force is lessthan 40 Newtons, resisting separation of the first portion from thesecond portion; and if the separation force is greater than 50 Newtons,separating the first portion from the second portion.